Roll v block support



Aug. 27, 1946. R C, sQwRE 2,406,514-

v INVENTOR.

BY ROBERT C. .SQu/RE ATTORNEY Aug 27, 1946. R. c.-sQu1RE ROLL VEE BLOCK4SUPPORT Filed June 5, i944 2 sheets-Sheet 2 l INVENTOR.l ROBERT C.SQu/RE ATToe/VEY ypiece II for gauging or other purposes.

Patented Aug. 27, 1946 ROLL v BLOCK SUPPORT ,Robertk C. Squire,Cleveland, Ohio, `assignor, by mesne assignments, to Jack & HeintzPrecision Industries, Inc., Qlevel f off Delaware and, Ohio, acorporation Application .lune 5, 1944,-Seri'al-No; 538,861

'Ijhis invention relates to an improved V `bloc-k support and has as itsgeneral object to provide a, support ofthis general typev which willhave a longer life before it must be reground and which may beregjroundwith greater facility than conventional V block supports. Aparticular object is to provide a V block support wherein the supportingtrough or V surfaces rcomprise hardened steel rolls which may be rotatedfrom timev to time to distribute the Wear without requiring a regrindingoperation until they have been worn on all sides thereof.

With these and other objects in View, the invention resides in theparticular arrangement and combination of parts to be described inconnection with the accompanying drawings in which:

Figure 1 is a plan View of a roll V block support embodying theprinciples of the invention;

Figure 2 is an end elevation View of the device shown in Figure 1,showing a sensitive gauge applied to the work; and

Figure 3 is an end elevation view of a modified form of the invention.

The device of Figures 1 and 2 comprises essentially a trough-shaped baseor housing I which contains a pair of hardened steel, cylindrical rolls2 and 3. The rolls 2 and 3 rest upon a plane horizontal surface 4 withinthe trough and are forced into an abutting relation along a line contactat 5 by means of a plurality of oppositely directed screws 6. The rolls2 and 3 are further constrained rigidly in the position shown in Figure2 by means of top plates 1 and 8 secured to the top surfaces of thehousing I by means of screws 9. The relationship of the parts is suchthat the toe portions I I) of the plates 'I and 8 bear firmly on therolls 2 and 3 to prevent any looseness in the assemblage. If desired,shirns may be provided between the plates 'I and the sides of thehousing I to which they are attached to maintain the proper force uponthe rolls 2 and 3 to compensate for wear when the latter are reground.

'Ihe rolls 2 and 3 thereby comprise a V block support adapted to supporta cylindrical work The numeral I2 indicates a gauge having a sensitivegauging nger I3 adapted to bear lightly upon the work. The gauge may besupported inthe conventional manner by a standard I4 on a base I5adapted forpositioning alongside the housing I on a common supportingsurface I6. The trough I is provided with lateral grooves or recesses I1for rmly clamping the same upon the surface I6 and the lower surface ofthe trough zclaims. (ci. zzn- 19.)

may be diagonally serrated to obtain a flat seating `upon the supportingVsurface I6 in. the presencexilf` chips and other foreign material.

Th1-1s, it willV be seen thatv if av large number of identical workpieces II are gaugedf, wear will voccur on the rolls 2 and 3 along linecontacts at 20, 20 between the work and the rolls in the same manner andto the same extent as the wear occurring in conventional one-piece Vblock supports, and when it accrues to a measurable amount, the supportmust be reground. In the present construction, when such measurableWearV occurs on the rolls 2 and 3, it is only necessary to slightlyloosen the screws 6, and the top plates 'I and 8, so that the rolls 2and 3 may be slightly rotated to bring true surfaces into contact withythe work piece I I. The rolls may thus be rotated a great number oftimes to distribute the wear therearound, before regrinding isnecessary, thus providing an initial life -before regrinding manyl timesthe initial life of a conventional one-piece V block support.

Another advantage is that the rolls 2 and 3 may be readily ground incenterless grinders to a true cylindrical shape much more easily thanthe plane V surfaces of a conventional V block support may be ground totrue planes, the regrinding of the latter being a relatively intricateoperation in order to obtain the desired degree of precision. In thismanner, the rolls 2 and 3 may be reground again and again withoutwidening the V. v

A still further advantage of the present construction is the universalutility of the device for supporting cylindrical work pieces II kofwidely varying diameters. Inasmuch as there is no gap between the rolls2 and 3, Very small, as well as very large, work pieces may be supportedwith equal facility and precision. The support is particularly adaptedfor testing cylindrical work pieces for eccentricity and taper, and forother purposes, as shown in Figure 2. The dial of the gauge I2 maycontain markings to indicate plus and minus tolerances in thousandths ofan inch,

' or other units, in accordance with the indication produced by the workengaging finger.

Numeral 2l indicates vertical holes through the sidewalls of the troughI, adapted to carry upstanding posts for a bridging memberhavingresilient bearingy on top of the work piece II.

In the modication shown in Figure 3, wherein the same reference numeralsare Vused to designate corresponding parts, upstanding posts 25 aresupported in tapped holes positioned in the same relation as the holes2I, 2| in Figure 1. These l In the embodiment of Figure 3 Y Y i providedon only one side of the troughV |to in- 1 1 sure the perfectalignmentjof vtherollsj2 ,and 3,

the appended claims'.Y

A posts carry a bridging member 26 urged downwardly by springs 21 whichare backed up by adjustable thumb screws 28.y `The bridge26 carries aslider 2'9 having work engaging rollers 30 toV z maintainV the workpiece I I in firmer contact with the rolls V2 `and 3 than would beaccomplished by i gravity alone.Y This additional holdingv meansprovides for greater accuracy 'and uniformity in gauging technique,particularlywhen the workl pieces are small or light, as in the case ofValuminum or magnesium alloy parts.

with the opposite side thereof. l

In accordance with the patent statutes, I have Iclaim: 1. A precision Vblock support, comprising a Y generally trough-like housing member, apair of Vset screws 6 Yarer shown and described preferred .embodimentsof e 1 the invention for the' purpose of illustrating the y 3 principlesthereof to enable others skil1ed in the art to make and use the same),Ybut it is vto be understood that the invention is capable .0f-manymodications. All 'such Vchanges in the Yconstruction and 'arrangement'yare Yincluded-inl the invention, the same beinglimitedV only bythescQpe of hardened smooth cylindrical rolls disposed lengthwise in thetrough of said member, a'plurality of clamping members carried by thesides of said troughlike member and engaging said rolls to maintain themin contacting side-by-side engagement, and a pair of top plates securedto the sides of said trough and. bearing upon the upperisurfaces of saidrolls to retain said rolls against the bottom of said trough.

2. A precisionv V block support, comprising a trough-like member havingapair of smooth cylindrical members clamped in side-by-side contactingrelation therein to present V supporting surfaces therebetween, a pairof upstanding posts on said trough, a bridging member carried by saidposts, a work-engaging member carried by said bridging member, andadjustable resilient means on'said posts acting onr said vbridgingmembergto urge said work-engaging memberagainst av work piece to holdsame rmlyfin contact with said V supporting surfaces.

Y lYRQBERT lC. SQUIRE. l

